Question # 1

Which metal is protected by a layer of its own oxide?

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AI

Ag

Au

Fe

Which of the following imparts violet colouration to the non-luiminous flame of Bunsen burner?

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NaCI

BaCI₂

CaCI₂

KCI

Natural fertilizer from plants and animals provide nitrogen

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1.5 kg

3.0 kg

4.5 kg

6 kg

Which of the following species participate in sulphonation of benzene ring?

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H₂SO₄

HSO^-₃

SO₃

SO^-₂

The freezing point of 1 molal NaCI solution assuming NaCI to be 100% dissociated in water in

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-1.86°C

-3.72°C

+1.86°C

+3.72°C

When quantity of electricity passed is one faraday then the mass deposited at the electrode is equal to

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One gm. atomic weight

One gm. Equivalent weight

Electrochemical equivalent

None of the above

The movement of solvent molecules through a semipermeable membrane is called

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Electrolysis

Electrophoresis

Osmosis

Cataphoresis

The dimension of rate constant of a second order reaction involves

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Neither time nor concentration

Only time

Time and concentration

Time and square of concentration

At 500 K the equilibrium constant for reaction cis-C₂H₂CI₂ trans-C₂H₂CI₂ is 0.6. At the same temperature the equilibrium constant for the reaction trans-C₂H₂CI₂ cis-C₂H₂CI₂ will be

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0.60

1.67

0.66

2.6

Which of the following statement regarding catalyst is not true?

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A catalyst remains unchanged in composition and quantity at the end of the reaction

A catalyst can initiate a reaction

A catalyst dose not alter the equilibrium in a reversible reaction

Catalysts are sometimes very specific in respect of reaction

The equilibrium constant in a reversible chemical reaction at a given temperature

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Depends on the initial concentration of the reactants

Depends on the concentration of one of the products at equilibrium

Does not depend on the initial concentrations of recatants

Is not characteristic of the reaction

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